Q. 85.0( 5 Votes )

Construct an isosceles triangle whose altitude is 5 cm and whose vertex angle is 80°.

Answer :

In an isosceles triangle, the altitude dropped from the vertex is also its angle bisector using this property we are going to construct the triangle


Step1: construct a line segment XY and consider a point M on it and using protractor draw a line perpendicular to XY passing through M



Step2: as the altitude is 5 cm mark point A above M at 5 cm



Step3: now using protractor draw lines at angles at 40° to the left of A and 40° to the right of A and mark the intersection points with line XY as B and C respectively thus required ΔABC is ready



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