Question

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Answer 1

Step-by-step explanation:

AREA OF TRIANGLE

$\frac{ \sqrt{3} }{4} {a}^{2} \\ \\ = \frac{ \sqrt{3} }{4} \times 15 \times 15 \\ \\ = \frac{225 \sqrt{3} }{4} \\ \\ we \: know \: the \: area \: of \: triangle \: \\ \\ = \frac{1}{2} \times b \times h \\ \\ \frac{225 \sqrt{3} }{4} = \frac{1}{2} \times 15 \times h \\ \\ \frac{225 \sqrt{3} }{4} \times 2 \times \frac{1}{15} = h \\ \\ 7.5 \sqrt{3} = h \\ \\ put \: the \: value \:of \: \sqrt{3} = 1.73(approx) \\ \\ 7.5 \times 1.73 = h \\ \\ 12.975 \: \: {cm}^{2} = h$

Answer 2

Answer:

30cm

an equilateral triangle have all angles same that is 60.

so for find height

• apply the formula of sin60
• 1/2=opposite (height) /hypo
• 1/2=oppo/15
• cross multiply

oppo=15/2=7.5cm

hope this helps