Answer:
B.)
Step-by-step explanation:
I think
we know that
area larger triangle (DEF)=[scale factor]²*area smaller triangle (ABC)
solve for scale factor
scale factor=√[area larger triangle/area smaller triangle]
scale factor=√[144/100]------> scale factor=1.2
therefore
measure EF=scale factor *measure BC
solve for measure BC
measure BC=measure EF/scale factor-------> 15/1.2------> 12.5 cm
the answer is
measure BC is 12.5 cm
Answer:
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SA formula: Ph + 2B
B is the trapezoid side.
using the formula:
(3+4+5+6)*5 + 2(16) = 126 cm^2
