Plane geometry

Question 1 of 10

Triangles ABC and PQR are similar with AB = 6, PQ = 9 and BC = 8. Find QR.

Question 2 of 10

The alternate segment theorem states that the angle between a tangent and a chord equals

Question 3 of 10

The sum of the interior angles of a polygon is 1,440°. How many sides has it?

Question 4 of 10

Alternate angles formed by a transversal and parallel lines are

Question 5 of 10

One angle of a cyclic quadrilateral is 70°. Find the angle opposite it.

Question 6 of 10

Two tangents from an external point to a circle are

Question 7 of 10

The diagonals of a rhombus

Question 8 of 10

ABCD is a parallelogram with ∠A = 3x + 10 and ∠B = 2x + 20. Find x.

Question 9 of 10

Two similar triangles have corresponding sides 3 cm and 9 cm. What is the ratio of their areas?

Question 10 of 10

The angles of a quadrilateral are x, 2x, 3x and 4x. Find x.