Michael is making a card for his dad's birthday. He's shaded a triangular section on the card where he wants to write his dad a
message. What is the area of the parts of the card that are not shaded? a) 144 sq cm b) 108 sq cm c) 72 sq cm d) 36 sq cm *If you do answer my question, could you tell me how and why that's your answer?
First, you find the area of the triangle. Which is 6 x 12 x .5 = 36. Then, you find the area of the rectangle. Which is 9 x 12 = 108 Finally, you subtract the triangle from the rectangle and you get 72. Hope this helped.