Question

. PQRS is a square and QTR is a triangle whose
two angles, that is, TQR and TRQ are each
of 60°. If QT = RT = 7 cm, find the perimeter
of PQRS.


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Answer 1

Answer:

In triangle QRT

60°+60°+angle QRT=180° (Angle Sum Property of triangle)

angle QRT=60°

All angles are of 60°, Hence, triangle QRT is an equilateral triangle.

QR=7cm (all the sides of equilateral triangle are equal)

Perimeter of square PQRS

=4×side

=4×7

=28cm

=