Geometry & Trigonometry

What is the sum of the interior angles of any triangle?

In a right triangle, if one acute angle measures $30^\circ$, what is the measure of the other acute angle?

Which trigonometric identity correctly expresses $\sin^2 \theta + \cos^2 \theta$?

If a circle has a radius of $5$ units, what is the length of the arc subtended by a central angle of $60^\circ$?

On the coordinate plane, what is the distance between points $A(2, 3)$ and $B(7, 11)$?

If the sides of a triangle are $3$, $4$, and $5$ units, what type of triangle is it?

The diameter of a circle is twice the length of its radius.

In coordinate geometry, the slope of a vertical line is zero.

The law of sines can be used to find unknown sides or angles in any triangle.