Question

28) Harry has a triangular banner with the dimensions shown below.
What is the area of the banner?

Answer 1

Answer:

y² +9y

Step-by-step explanation:

Area of triangle:

base = y +9

height = 2y

$\sf \text{Area of triangle = \dfrac{base *height}{2} }$

                         $\sf =\dfrac{(y+9)*2y}{2}\\\\ = (y + 9) * y$

                         $\sf = y*y + 9*y\\\\ = y^2 + 9y$