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Triangles Class 9 PPT
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Page 2 In geometry, two polygons are similar when one is a replica (scale model) of the other. Page 3 In geometry, two polygons are similar when one is a replica (scale model) of the other. Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini Me is supposed to be an exact replica of Dr. Evil. EXIT BACK NEXT Page 4 In geometry, two polygons are similar when one is a replica (scale model) of the other. Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini Me is supposed to be an exact replica of Dr. Evil. EXIT BACK NEXT Page 5 In geometry, two polygons are similar when one is a replica (scale model) of the other. Consider Dr. Evil and Mini Me from Mike Meyers’ hit movie Austin Powers. Mini Me is supposed to be an exact replica of Dr. Evil. EXIT BACK NEXT EXIT BACK NEXT The following are non-similar figures. I IIRead More
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FAQs on Triangles Class 9 PPT
| 1. What are the different types of triangles? |  |
Ans. There are three main types of triangles: equilateral, isosceles, and scalene. An equilateral triangle has three equal sides and three equal angles of 60 degrees each. An isosceles triangle has two equal sides and two equal angles. A scalene triangle has three unequal sides and three unequal angles.
| 2. How can I determine the area of a triangle? | |
Ans. The area of a triangle can be calculated using the formula A = 1/2 * base * height. The base is the length of one side of the triangle, and the height is the perpendicular distance from the base to the opposite vertex.
| 3. Can a triangle have two right angles? | |
Ans. No, a triangle cannot have two right angles. The sum of the angles in a triangle is always 180 degrees. If a triangle has two right angles, the third angle would be 180 - 90 - 90 = 0 degrees, which is not possible.
| 4. How can I determine if three given side lengths form a triangle? | |
Ans. To determine if three given side lengths form a triangle, you can apply the triangle inequality theorem. According to this theorem, the sum of the lengths of any two sides of a triangle must be greater than the length of the third side. If this condition is satisfied for all three combinations of sides, then the given lengths form a valid triangle.
| 5. How do congruent triangles differ from similar triangles? | |
Ans. Congruent triangles have the same shape and size, meaning that all corresponding sides and angles are equal. Similar triangles, on the other hand, have the same shape but may differ in size. Corresponding angles of similar triangles are equal, but corresponding sides are in proportion to each other.
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