Find the height of an equilateral trisngle if its are is 35 cm and perimeter of 15 cm?
A.20cm B.14cm
C11.7cm D5cm
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Find the height of an equilateral trisngle if its are is 35 cm and perimeter of 15 cm?
A.20cm B.14cm
C11.7cm D5cm
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Answer:
B. 14
Step-by-step explanation:
Perimeter of a equilateral triangle = S + S +S
Since perimeter is given as 15cm we can substitute that to the formula above to solve for S :
15 = S + S + S
15 = 3S
divide both sides by 3 then we can get S = 5
Now to solve for the height use the formula for
Area of a triangle = (1/2)(b)(h)
since the area is given as 35 cm and we have found the base or S as 5 cm substitute the values to find the height