Geometry
# Properties of Triangles

$7\text{ m}$ and an area of $84\text{ m}^2$. What is its perimeter?

A right triangle has a leg of length

In $ABC$, sides $AB$ and $AC$ are equal in length and $\angle A$ measures $80^\circ$.

If the points **D**, **E**, and **F** are on sides **BC, CA,** and **AB** respectively, such that $CE= CD,BF=BD$, then what is $\angle EDF$?

The sides of a right triangle are $a$, $a+d$ and $a+2d$ with $a$ and $d$ both positive. What is the value of $a:d$?

**Note**: Image drawn not up to scale.

Arjit drew an isosceles right angled triangle on the board. What is the measure of the base angle?