Question

Please help with this question

Answer 1

A = 1/2 BH

#17
B = 3 H = 4
A = 1/2 BH
A = 1/2 (3)(4) = 6

#18
B = 6 H = 4
A = 1/2 BH
A = 1/2 (6)(4) = 12

#19
B = 12 H = 8
A = 1/2 BH
A = 1/2 (12)(8) = 48

#20
B = 11 H = 5
A = 1/2 BH
A = 1/2 (11)(5) = 27.5