Draw three traingles with lengths of two sides 4cm,5cm and the angle made by them 60°,90° and 120°. Draw the perpendicular bisectors their sides.
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Step-by-step explanation:
Take the side of length 5 as your base. . When you draw a height. using this base ,you will get a 30-60-90 triangle with a hypotenuse of4 since the short side in this triangle is our height,and since the short side in a 30-60-90 triangle is half the hypotenuse,the height is 2 . So the aarea is 5*2/2 = 5
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