WHAT HAVE I LEARNED ABOUT TRIANGLES?

 

5.    The perimeter of an isosceles triangle is 492.3 cm. Find the length of the basis, if the sides are 152.6 cm long.

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6.       Is it possible to draw a triangle, which

·        sides are 6 cm, 8 cm and 15 cm

·        two angles are 103° and 85°

·        all three angles are bigger than 45°

·        the area is 10 cm² and one side is 1 m?

7.Find the acute angle a of a right triangle, if the other acute angle is b.

 

b = 34º ..................... b = 75º .....................

8. How much triangles are on the drawing?