Page 1 Mark the correct alternative in each of the following: 1. Total number of parts of a triangle is (a) 3 (b) 6 (c) 9 (d) 1 Solution: The option (b) is the correct answer. Total number of parts of a triangle is 6. 2. A perpendicular drawn from a vertex to the opposite side of a triangle is known as (a) an altitude (b) a median (c) an angle bisector (d) a bisector Solution: The option (a) is the correct answer. A perpendicular drawn from a vertex to the opposite side of a triangle is known as an altitude. 3. A triangle (a) may not have an altitude (b) can have at most 3 altitudes (c) has three altitudes (d) has only one altitude Solution: The option (c) is the correct answer. A triangle has three altitudes. 4. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as (a) medians (b) altitudes (c) heights (d) angle bisectors Solution: The option (a) is the correct answer. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as medians. 5. A triangle whose no two sides are equal is known as (a) an acute triangle (b) a scalene triangle (c) an isosceles triangle (d) an equilateral triangle Solution: Page 2 Mark the correct alternative in each of the following: 1. Total number of parts of a triangle is (a) 3 (b) 6 (c) 9 (d) 1 Solution: The option (b) is the correct answer. Total number of parts of a triangle is 6. 2. A perpendicular drawn from a vertex to the opposite side of a triangle is known as (a) an altitude (b) a median (c) an angle bisector (d) a bisector Solution: The option (a) is the correct answer. A perpendicular drawn from a vertex to the opposite side of a triangle is known as an altitude. 3. A triangle (a) may not have an altitude (b) can have at most 3 altitudes (c) has three altitudes (d) has only one altitude Solution: The option (c) is the correct answer. A triangle has three altitudes. 4. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as (a) medians (b) altitudes (c) heights (d) angle bisectors Solution: The option (a) is the correct answer. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as medians. 5. A triangle whose no two sides are equal is known as (a) an acute triangle (b) a scalene triangle (c) an isosceles triangle (d) an equilateral triangle Solution: The option (b) is the correct answer. A triangle whose no two sides are equal is known as a scalene triangle. 6. A triangle whose two sides are equal is known as (a) acute triangle (b) an isosceles triangle (c) a scalene triangle (d) an isosceles triangle Solution: The option (b) is the correct answer. A triangle whose two sides are equal is known as an isosceles triangle. 7. A triangle whose all sides are equal is called (a) an equilateral triangle (b) an acute triangle (c) a right triangle (d) an isosceles triangle Solution: The option (a) is the correct answer. A triangle whose all sides are equal is called an equilateral triangle. 8. The sum of the length of sides of a triangle is known as its (a) area (b) height (c) perimeter (d) region Solution: The option (c) is the correct answer. The sum of the length of sides of a triangle is known as its perimeter. 9. A triangle having all sides of different length is known as (a) scalene triangle (b) isosceles triangle (c) an equilateral triangle (d) an acute triangle Solution: The option (a) is the correct answer. A triangle having all sides of different length is known as scalene triangle. 10. A triangle whose one angle is more than 90° is called (a) a scalene triangle (b) a right triangle (c) an acute triangle (d) an obtuse triangle Solution: Page 3 Mark the correct alternative in each of the following: 1. Total number of parts of a triangle is (a) 3 (b) 6 (c) 9 (d) 1 Solution: The option (b) is the correct answer. Total number of parts of a triangle is 6. 2. A perpendicular drawn from a vertex to the opposite side of a triangle is known as (a) an altitude (b) a median (c) an angle bisector (d) a bisector Solution: The option (a) is the correct answer. A perpendicular drawn from a vertex to the opposite side of a triangle is known as an altitude. 3. A triangle (a) may not have an altitude (b) can have at most 3 altitudes (c) has three altitudes (d) has only one altitude Solution: The option (c) is the correct answer. A triangle has three altitudes. 4. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as (a) medians (b) altitudes (c) heights (d) angle bisectors Solution: The option (a) is the correct answer. Line segments joining the vertices to the mid-points of the opposite sides of a triangle are known as medians. 5. A triangle whose no two sides are equal is known as (a) an acute triangle (b) a scalene triangle (c) an isosceles triangle (d) an equilateral triangle Solution: The option (b) is the correct answer. A triangle whose no two sides are equal is known as a scalene triangle. 6. A triangle whose two sides are equal is known as (a) acute triangle (b) an isosceles triangle (c) a scalene triangle (d) an isosceles triangle Solution: The option (b) is the correct answer. A triangle whose two sides are equal is known as an isosceles triangle. 7. A triangle whose all sides are equal is called (a) an equilateral triangle (b) an acute triangle (c) a right triangle (d) an isosceles triangle Solution: The option (a) is the correct answer. A triangle whose all sides are equal is called an equilateral triangle. 8. The sum of the length of sides of a triangle is known as its (a) area (b) height (c) perimeter (d) region Solution: The option (c) is the correct answer. The sum of the length of sides of a triangle is known as its perimeter. 9. A triangle having all sides of different length is known as (a) scalene triangle (b) isosceles triangle (c) an equilateral triangle (d) an acute triangle Solution: The option (a) is the correct answer. A triangle having all sides of different length is known as scalene triangle. 10. A triangle whose one angle is more than 90° is called (a) a scalene triangle (b) a right triangle (c) an acute triangle (d) an obtuse triangle Solution: The option (d) is the correct answer. A triangle whose one angle is more than 90° is called an obtuse triangle.Read More

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