Area of a right triangle

The area of a right triangle is half the product of its legs.

1. Multiply the lengths of the two legs: a · b.
2. Divide the product by 2.

Formula: A = (a · b) / 2. Give the answer in square centimetres (cm²).

Find the area of the triangle by multiplying its base by its height and dividing the product by 2.

1. Multiply the base length a m by the height b m.
2. Divide the product by 2.
3. Write the answer in square metres (m²).

Calculation: (a × b) ÷ 2.

Formula: A = (b × h) ÷ 2.

The area of a right triangle is half the product of its legs.

1. Multiply the lengths of the two legs: a · b.
2. Divide the product by 2.

Formula: A = (a · b) / 2. Give the answer in square centimetres (cm²).

The area of a right triangle is calculated using A = a · b / 2.

1. Multiply the area by 2: 2 · s.
2. Divide the result by the known leg b.

Other leg = 2 · s / b. Give the answer in centimetres.

Calculate the areas of both right triangles using A = a · b / 2.

1. First triangle: A₁ = a · b / 2.
2. Second triangle: A₂ = c · d / 2.
3. Compare A₁ and A₂ and choose the greater area.

The two perpendicular sides of a right triangle may be used as its base and height.

1. Find the lengths of the two perpendicular sides in the diagram.
2. Multiply them.
3. Divide the product by 2 because two such triangles would form a rectangle.

Formula: A = (a × b) ÷ 2.

The area of a right triangle is half the product of its legs.

1. Multiply the lengths of the two legs: a · b.
2. Divide the product by 2.

Formula: A = (a · b) / 2. Give the answer in square centimetres (cm²).

Find a triangle’s area by multiplying the base by its perpendicular height, then dividing by 2.

For example, a base of 6 m and height of 4 m give 6 × 4 ÷ 2 = 12 m². The height must be perpendicular to the base; it is not necessarily another side.

The area of a right triangle is S = a · b / 2, where a and b are the lengths of its legs.

1. Multiply the given area S by 2.
2. Divide the result by the length of the known leg.
3. This gives the length of the other leg.

Formula: unknown leg = 2 · S / known leg. Write the answer in centimetres.

Find the area of the triangle by multiplying its base by its height and dividing the product by 2.

1. Multiply the base length a m by the height b m.
2. Divide the product by 2.
3. Write the answer in square metres (m²).

Calculation: (a × b) ÷ 2.

Formula: A = (b × h) ÷ 2.