Lines, Angles, and Triangles

SAT Math· difficulty 3/5

A rectangle has sides of length 9 and 12. What is the length of its diagonal?

A
$21$
B
$\sqrt{225}$
C
$\sqrt{21}$
D
$15$
check_circle

Explanation

= \\sqrt{9^2 + 12^2} = \\sqrt{81 + 144} = \\sqrt{225} = 15

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

Practice 10 like thisarrow_forward Predict my AP score

Related questions

sat-math-geo1-098
A circle is inscribed in an equilateral triangle of side length 12. What is the radius of the inscribed circle?…
chevron_right
sat-math-geo1-106
In triangle ABC, the exterior angle at C measures 115°. The interior angle at A is twice the interior angle at B. What is the measure of angle B?…
chevron_right
sat-math-geo1-035
The angles of a triangle are (2x)°, (3x)°, and (4x)°. What is the value of x?…
chevron_right

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