Respuesta :

Step-by-step explanation:      

Step 1: Using the Formulas

A = bh/2

Step 2: Solving for A

A = 1/4 b

= 1/4

1/4 x 10

Answer:  = 96.82458cm²

Formula:

Shape: Isosceles triangle

Solve for: Area

A side: 20 cm

B Base: 10 cm

Explanation in words (Short Form)

-  The first step is to use the formula for the Isosceles triangle which is

A = bh/2

- The second step is to solve for A using the formula for Isosceles triangle and at the end the answer will result as 1/4

- The third step is to times the answer by 10 because the base is 10. So finally the answer will result as: 96.82458cm²

Answer:    

A≈96.82cm²

Hope this helps.