R S Aggarwal Solutions for Chapter: Constructions, Exercise 3: EXERCISE 17C

The sum of all angles in a triangle is

The sum of all angles of a quadrilateral is 

In the given figure $AB\parallel CD, \angle OAB=150°, \angle OCD=120°$. Then $\angle AOC=$?

In the given figure, $PQ\parallel RS, \angle PAB=60°$ and $\angle ACS=100°$. Then $\angle BAC=$?

In the given figure, $AB\parallel CD\parallel EF, \angle ABG=110°, \angle GCD=100°$ and $\angle BGC=x°$. Then $x=$?

The sum of any two sides of a triangle is always

The diagonals of a rhombus

In a $∆ABC$, it is given that $\angle B=37°$and $\angle C=29°$. Then, $\angle A=?$