Circles

SAT Math· difficulty 4/5

From external point P, two tangents are drawn to a circle, touching at points A and B. If PA = 9, what is PB?

A
$Cannot be determined$
B
$18$
C
$9$
check_circle
D
$\sqrt{18}$

Explanation

Two tangents drawn from an external point have equal length. So PB = PA = 9.

Want 10 more like this — adaptive to your weak spots?

Practice 10 like thisarrow_forward Predict my AP score

Related questions

sat-math-geo1-083
A quadrilateral is inscribed in a circle. Two opposite angles measure 80° and x°. What is the value of x?…
chevron_right
sat-math-geo1-046
An inscribed angle in a circle subtends a diameter. What is the measure of the inscribed angle?…
chevron_right
sat-math-geo1-124
A circle is tangent to the x-axis and passes through the points (0, 4) and (6, 4). What is the radius of the circle?…
chevron_right

auto_awesomeAll Tools question_answerHomework Q&A menu_bookAP & SAT Prep timelineLearn Mode