Triangle Perimeter and Area Quiz

What is the formula to find the perimeter of an equilateral triangle?

• 4s

• 3s

• 2s

• 5s

If the sides of an equilateral triangle are each 5 cm long, what is its perimeter?

• 20 cm

• 10 cm

• 15 cm

• 25 cm

What is the formula to find the area of a right-angled triangle?

• Area = (base x height) / 2

• Area = (base x height) + 2

• Area = base x height

• Area = (base + height) / 2

If the base of a right-angled triangle is 6 cm and the height is 8 cm, what is its area?

• 10 cm²

• 30 cm²

• 14 cm²

• 24 cm²

What is the formula to find the perimeter of a scalene triangle?

• Add the lengths of all three sides together

• Divide the lengths of all three sides by 2

• Subtract the lengths of all three sides

• Multiply the lengths of all three sides together

If the sides of a scalene triangle are 4 cm, 7 cm, and 9 cm, what is its perimeter?

• 10 cm

• 25 cm

• 15 cm

• 20 cm

What is the formula to find the area of an isosceles triangle?

• base * height

• base + height

• (base * height) / 2

• base - height

If the base of an isosceles triangle is 10 cm and the height is 6 cm, what is its area?

• 25 cm²

• 40 cm²

• 16 cm²

• 30 cm²

What is the formula to find the area of an equilateral triangle?

• 2 * side length squared

• 3 * side length squared

• (side length squared) / 2

• (sqrt(3) / 4) * side length squared

If the side of an equilateral triangle is 12 cm, what is its area?

• 72√3 cm²

• 144 cm²

• 48√3 cm²

• 36√3 cm²