Finding the Area of a Triangle

What is the formula for the area of a triangle?

• A = 1/2 bh

• A = bh

• A = s + s + s

Find the area of the triangle.

• 26 square cm

• 40 square cm

• 13 square cm

• 20 square cm

What is the area?

• 12 square cm

• 12

• 14 square cm

• 14

What is the area of the triangle?

• 70 square m

• 140 square m

• 60 square m

• 120 square m

A triangle has a base of 10 cm and a height of 6 cm. What is its area?

• 60 cm²

• 30 cm²

• 20 cm²

• 15 cm²

A triangle has a base of 12 cm and a height of 9 cm. Calculate its area.

• 54 cm²

• 108 cm²

• 36 cm²

• 72 cm²

Find the area of a triangle with a base of 14 inches and a height of 3 inches.

• 21 square inches

• 42 square inches

• 10.5 square inches

• 7 square inches

Calculate the area of a triangle with sides measuring 6 cm, 8 cm, and 10 cm.

• 24 cm²

• 48 cm²

• 12 cm²

• 36 cm²

Which expression below will find the Area of this triangle?

Find the area.

• 180 in²

  180 square inches

• 165 in²

  165 square inches

• 105 in²

  105 square inches

• 100 in²

  100 square inches

Answer explanation

To find the area, we need to separate the area into the shapes we know - triangles and rectangles.

On the right end, we can say there is a rectangle that is 3 units wide and 10 units tall.

On the left side, the base of the triangle would be 15 units (18 - 3) because we cannot count the rectangle piece as part of the triangle's base. The triangle is also 10 units tall.

Triangle area: (15 x 10) / 2 = 150 / 2 = 75

Rectangle area: 3 x 10 = 30

Add the two areas together: 75 + 30 = 105