Question

EXERCISE 12.1
1. A traffic signal board, indicating ‘SCHOOL AHEAD', is an equilateral triangle with
side `a`. Find the area of the signal board, using Heron's formula. If its perimeter is
180 cm, what will be the area of the signal board?
2. The triangular side walls of a flyover have been used for advertisements. The sides of
the walls are 122 m, 22 m and 120 m (see Fig. 12.9). The advertisements yield an
earning of 5000 per mº per year. A company hired one of its walls for 3 months. How
much rent did it pay?
122m
22m
120m​

Answer 1

Answer:

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