1
A shape with three straight sides and three angles.
2
The ...... for the perimeter of a triangle is p = a+b+c.
3
The measurement of how long something is.
4
Like a rectangle, but the sides are equal.
5
An angle of 90º is a ....... angle
6
The square ...... of 25 is 5.
7
A triangle has three angles and three ..........
