Answer:
C
Explanation:
The area (A) of a triangle is calculated as
A = bh ( b is the base and h the perpendicular height )
Give x is 4 more than 6, that is x = 10 , then
b = x = 10 and h = 2x = 2(10) = 20 , so
A = × 10 × 20 = 5 × 20 = 100 units² → C
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bh ( b is the base and h the perpendicular height ) × 10 × 20 = 5 × 20 = 100 units² → C