POST QUIZ

An angle of 170 degrees forms a complete revolution with an angle of …………… degrees.

• 190
• 180

• 90

• 170

The angle at the center of a circle is …………… the angle at the circumference standing on the same arc.

• tripled

• twice

• half

• equal

Find, in terms of 𝜋, the arc length and area of a quadrant of the circle with radius 20 meters.

• 5𝜋 meters, 100𝜋 square meters

• 20𝜋 meters, 400𝜋 square meters

• 15𝜋 meters, 10𝜋 square meters

• 10𝜋 meters, 100𝜋 square meters

Complete: When two chords intersect within a circle, the products of the intercepts are …………… .

• half

• twice

• equal

• greater

Complete: Tangents to a circle from an external point have …………… length.

• half

• twice

• equal

• greater

Complete: The product of the intercepts on a secant from an external point is equal to the …………… of the tangent from that point.

• square

• square root

• equal

• twice

A tangent of length 15 meters from an external point 𝑇 meets a circle with center 𝑂 and radius 8 meters at the point 𝑃 on its circumference. Calculate the length of 𝑂𝑇.

• 7 meters

• 17 meters

• 27 meters

• 10 meters

Find the arithmetic mean of: −7 and 9

• 1

• 2

• 10

• 16

Find the arithmetic mean of: 2√3 − 3 and 2√3 + 3

• √3

• 2√6

• 2√3

• 2√3 - 3

Consider the arithmetic sequence: 2,−3,−8,…

Write down the next term of the sequence.

• 13

• -13

• 11

• -11