Question

Find the area of Triangle A in square centimeters.



Do not include units (cm2) in your answer.

Show your reasoning.

Answer 1

Answer:

81/8

Step-by-step explanation:

area of triangle= 1/2×base×height

A/Q

1/2×9/2×9/2

= 81/8

Answer 2

Answer:

10.125

Step-by-step explanation:

Rotate the figure 90° clockwise and you will see that the dotted line becomes the height of the triangle.

So we have a triangle with base and height = 4.5 cm

Area = 1/2 bh

= 0.5 × 4.5 × 4.5

= 10.125 cm^2