Answer:
31.5 cm squared
Explanation:
the formula for a triangle is base x height / 2. so 18 x 3.5 = 63. then you divide it by 2 which is 31.5
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31.5
to find the area of a triangle you just need to multiply the base by the height and divide that by 2.
(18*3.5)/2
63/2
area = 31.5
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