Answer:
40.5 square cm
Explanation:
This is the answer because:
1) The area of a triangle is b x h/2
2) The base is 9 and the height is 9. Therefore, multiply 9 and 9
9 x 9 = 81
3) Finally, divide 81 with 2
81/2 = 40.5
4) Since they are asking for area, it would be square cm
Hope this helps!