Geometry: Lines, Angles, Triangles and Quadrilaterals Crossword

The size of an acute is less than?
An angle larger than 180 but less than 360 degrees
Angles that add up to 90 degrees
When two straight lines intersect, the vertically opposite angles are...
When parallel lines are cut by a transversal, these angles are supplementary
Three-hundred-and-sixty degrees
Triangles with two sides equal on length
What should you add to obtain the size of the exterior angle of a triangle
A quadrilateral with one pair of opposite sides parallel
A quadrilateral with the longest diagonal bisecting the shorter one
Both pairs of opposite sides are parallel
The side opposite the right-angle in a triangle
Theorem associated with a right-angled triangle