There are two" set-square" in your box.What are the measures of the anles that ae formed at their corners?Do they have any angle measure that is common?

Two angles are congruent if they have equal measure.

You have two set -squares in your mathematical instruments box . Are they symmetric ? There are two set squares in our mathematical instruments box , they are : (i) 30^(@) - 60^(@) - 90^(@) set square (ii) 45^(@)- 45^(@)-90^(@) set square

Use the figure to name: (a) 5 triangles (b) 5 quadrilaterals ( c) 5 angles formed (d) Which two triangles have angleB in common ?

Two adjacent angles of a parallelogram have equal measure. Find the measure of each of the angles of the parallelogram.

(i)If four squares are chosen at random on a chess board, find the probability that they lie on diagonal line. (ii) If two squares are chosen at random on a chess board, what is the Probability that they have exactly on corner in common? (iii) If nine squares are chosen at random on a chess board, what is the probability that they form a square of size 3x3?