There are two set-squares in your box. What are the measures of the angles that are formed at their corners? Do they have any angle measure that is common?
To do:
We have to find the measures of the angles that are formed at the corners of two set-squares.
Solution:
The measures of angles in one of the set squares are $30^o, 60^o$ and $90^o$
The measures of angles in the other set square are $45^o, 45^o$ and $90^o$
Yes, the $90^o$ angle is common between the two set-squares.
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