Question

two adjacent sides of a parallelogram are 6cm and 4cm find its perimeter with method ☺️​

Answer 1

Answer:

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Step-by-step explanation:

If we drop the perpendicular to AB from D to the foot F we get our 30 60 90 right triangle. We extend the perpendicular by reflecting D through AB giving G and get equilateral triangle ADG. DG is bisected by AB so DF=2. That’s the altitude of our parallelogram, so the area must be base times altitude, 2×6=12.

Check:

The trig formula is absinθ=(4)(6)sin30=(4)(6)(12)=12✓.