Q1. What is the perimeter of a regular triangle if one side is 5 cm long?
Ans: 15 cm
Q2. Is a regular triangle right, obtuse, or acute?
Ans: Acute
Q3. How many mm are in 15.3 cm?
Ans: 153 mm
Q4. Two short sides of a right triangle are 3 and 4 units. How long is the hypotenuse?
Ans: 5 units
Q5. Two short sides of a right triangle are 6 and 8 units. How long is the hypotenuse?
Ans: 10 units
Q6. What is a formula to find the area of a circle?
Ans: A = πr2 or
A = π x r x r
Q7. What is the approximate value of pi to two decimal places?
Ans: 3.14
Q8. What will the ratio of the circumference of a circle to its diameter always be equal to?
Ans: π
Q9. A kite is 80 cm tall and 60 cm across. All of its sides are equal. What is its perimeter?
Ans: 200 cm
Q10. The length of a hypotenuse of a right triangle is √5 cm. How long might the sides be?
Ans: 2 cm and 1 cm
Q11. What is the name of a regular rectangle?
Ans: Square
Q12. Is a regular triangle isosceles, equilateral, or scalene?
Ans: Equilateral
Q13. How many mm are in 205.64 cm?
Ans: 2056.4 mm
Q14. If the lengths of the sides of the above triangle are all doubled, what happens to the measurements of the angles?
Ans: They remain the same.
Q15. The hypotenuse of a right triangle is 15 cm long, and one of the sides is 9 cm. How long is the missing side?
Ans: 12 cm
Q16. A circle has a diameter of 10 cm. What is the radius?
Ans: 5 cm
Q17. If you add the interior angles of any triangle, how many degrees will there be?
Ans: 180°
Q18. If you add the interior angles of any rectangle, how many degrees will there be?
Ans: 360°
Q19. Find the perimeter.
Ans: 24 m
Q20. Find the diagonal.
Ans: 1 m
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