Two equal sides of a triangle are each 4m less than three times the third side. Find the dimensions of the triangle, if its perimeter is 55m.
Question
Using your protractor draw an angel BAC of measure 120 degree. With this aangle as given, draw an angle of measure 90 degree. Verify by measurement. [HINT : 1draw a ray AX, the bisector of angle BAC. 2 draw a ray AY, the bisector of angle CAX. 3 Then BAY is the required angle. ]
7 & 8 give solution.