Answer:
Explanation:
I will answer only a few
12.) the area of a triangle is half its base times its height
= 17 * 13
= 221
13.) 1/2 * 20 * 28
= 10 * 28
=280 cm^2
#12=442
#13=560
#14=918
26x17=442
28x20=560
27x34=918
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