Write down the formula to calculate the area of an isosceles triangle whose equal sides are 'a' unit and base is 'b'unit.
1 answer:
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Answer: B
Step-by-step explanation:
To isolate x, you divide both sides by 21
21x=7
x = 7/21
Simplify by dividing both the numerator and denominator by 7
x = 1/3
Since, 1/3 is not an option, B is the correct answer
