Question

1. what is the area of this triangle?

diagram: right triangle with height 8 cm, base 20 cm
options:

• 160 square centimeters
• 40 square centimeters
• 80 square centimeters
• 320 square centimeters

Explanation:

Step1: Recall triangle area formula

The formula for the area of a triangle is $A = \frac{1}{2} \times base \times height$.

Step2: Identify base and height

From the diagram, the base is $20\ cm$ and the height is $8\ cm$.

Step3: Substitute values into formula

Substitute $base = 20$ and $height = 8$ into the formula: $A=\frac{1}{2} \times 20 \times 8$.
First, calculate $20\times8 = 160$, then $\frac{1}{2}\times160 = 80$.

Answer:

80 square centimeters