Question

What is the area of a triangle whose base is 10 centimeters and whose height is 20 centimeters?

- 15 cm
- 30 cm
- 100 cm
- 200 cm

Answer 1

The formula of an area of a triangle:

`A_\Delta=(base\cdot height)/(2)`

We have:

base = 10 cm and height = 20 cm. Substitute:

`A_\Delta=(10cm\cdot20cm)/(2)=(200)/(2)\ cm^2=100\ cm^2`

Answer: 100 cm²

Answer 2

Area of a triangle = 1/2 base * height

A = 1/2 (10)* 20

A= 5*20

A = 100 cm^2

Choice C