## anonymous one year ago An isosceles trapezoid has base angles of 45° and bases of lengths 9 and 15. The area of the trapezoid is 36 sq. units 67.5 sq. units 72 sq. units I got 36 sq. units. is this correct @debbieG

1. anonymous

@satellite73 is this right? I think I did it right...lol

2. Jack1

|dw:1434765270292:dw| is this right?

3. Jack1

$$\Large Area = \frac{a+b}2h$$ a = 9 b = 15 h = ...?

4. Jack1

|dw:1434765513049:dw|

5. anonymous

But I didn't receive a height??? I'm so confused.

6. anonymous

And where did you get 3???

7. Jack1

|dw:1434765645811:dw|

8. Jack1

2 isosceles triangles, each with 45 degree angles... so they myst be 1:1:sqrt 2 triangles

9. anonymous

So how do you figure out the answer?

10. Jack1

|dw:1434765804138:dw|

11. Jack1

so height = 3 $$\Large Area=\frac{a+b}2 \times h$$ a = 9 b = 15 h = ...3 area = 36

12. anonymous

So I plugged it into the formula, and I got 36. So I am correct?

13. anonymous

Thank you :)

14. Jack1

yep perfect no problems dude ;)