Victory for the ACT Student Text 15e

240 • M ATH

18.  –Š‡ ϐ‹‰—”‡ „‡Ž‘™ǡ ƒ…‹”…Ž‡ ‹• ‹•…”‹„‡† in an equilateral triangle. If the radius of the circle is 1, what is the perimeter of the triangle? F. 3 G. 2 3 H. 3 3 J. 6 K. 6 3 20. If a circle with a radius of 1 foot is inscribed in a square, what is the area, in square feet, of the square? F. 2 2 G. 1 H. 2 J. 2 K. 4 21. An isosceles right triangle is inscribed in a circle with a radius of 1 inch such that all three vertices of the triangle are points on the circle. What is the area, in square inches, of the triangle? A. 3 2 B. 2 1 C. 1 D. 2 E. 2 2

 –Š‡ ϐ‹‰—”‡ „‡Ž‘™ǡ BCDE is a square with an area of 4. What is the perimeter of ABE T ? Š‡ ϐ‹‰—”‡ „‡Ž‘™ •Š‘™• –™‘…‹”…Ž‡• ‘ˆ diameter 2 that are tangent to each other at point P . The line segments form a rectangle and are tangent to the circles at the points shown. What is the area of the •Šƒ†‡† ’‘”–‹‘ ‘ˆ –Š‡ ϐ‹‰—”‡ǫ A. 4 2 r B. 4 r C. 8 2 r D. 8 r E. 2 r

19.

COMPLEX FIGURES

22.

F. 3 G. 4 H. 6 J. 8 K. 12