Two equilateral triangles of side $10\sqrt{3}$ cm are joined to form a quadrilateral. What is the altitude of the quadrilateral?
Answer & explanation
Correct answer: option 4
We know,
Height of triangle = Height of quadrilateral
Height of the quadrilateral = \(\frac{\sqrt {3}}{2}\) × a = \(\frac{\sqrt {3}}{2}\) × 10\(\sqrt {3}\) = 15 cm