Question

help me with the third question

Answer 1

Answer:

answer for the given problem is given

Answer 2

The area of a triangle is base*height*1/2.

Since we can make two similar triangles by drawing a perpendicular line, a cm is a base.

Draw a perpendicular line to the base. Then use the Pythagorean Theorem on the right triangle. The height is $\sqrt{b^2-\frac{a^2}{4} }$.

Now:

Height is $\sqrt{b^2-\frac{a^2}{4} }$ cm.

Base is a cm.

Therefore:

Area = $\frac{1}{4} a\sqrt{4b^2-a^2}$ cm²

Hence, false.