Question

find the area. 8 cm 21 cm a = ? cm² a△ = 1/2 b · h

Explanation:

Step1: Identify base and height

The base $b = 21$ cm and height $h=8$ cm.

Step2: Apply area formula

$A=\frac{1}{2}\times b\times h=\frac{1}{2}\times21\times8$.

Step3: Calculate the result

$\frac{1}{2}\times21\times8 = 84$ cm².

Answer:

84