Perimeter and Area of Triangles

What is the formula for calculating the perimeter of a triangle?

• Perimeter = side1 * side2 + side3

• Perimeter = (side1 + side2 + side3) / 2

• Perimeter = side1 * side2 * side3

• Perimeter = side1 + side2 + side3

If the sides of a triangle are 5 cm, 7 cm, and 9 cm, what is the perimeter?

• 15 cm

• 18 cm

• 21 cm

• 25 cm

How do you calculate the area of an equilateral triangle?

• Area = (sqrt(3) / 4) * s^2

• Area = 2 * s^2

• Area = s^3

• Area = (s^2) / 2

If the height of an equilateral triangle is 8 cm, what is its area?

• 64 cm²

• 16√3 cm²

• 24 cm²

• 32√3 cm²

What is the formula for calculating the area of a triangle?

• A = base * height

• A = (base * height) / 2

• A = (base + height) / 2

• A = base + height

If the base of a triangle is 6 cm and the height is 4 cm, what is the area?

• 24 cm²

• 10 cm²

• 12 cm²

• 8 cm²

How do you identify the base and height of a triangle?

• Count the number of vertices in the triangle

• Look for the side that is parallel to the base

• Measure the longest side of the triangle

• Look for the side that is perpendicular to the base

If the area of a triangle is 24 square units and the base is 8 units, what is the height?

• 12 units

• 4 units

• 10 units

• 6 units

How do you solve for the missing side length using the perimeter of a triangle?

• Add the two given side lengths to the perimeter.

• Divide the perimeter by the sum of the two given side lengths.

• Subtract the sum of the two given side lengths from the perimeter.

• Multiply the two given side lengths by the perimeter.

If the perimeter of a triangle is 20 cm and two sides are 6 cm and 7 cm, what is the length of the third side?

• 10 cm

• 5 cm

• 8 cm

• 7 cm