Given the absolute value and the angle of a complex number, express the number in the form a+bi. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Explore and measure a variety of quadrilaterals.

Relates the unit circle to the method for finding trig ratios in any of the four quadrants. Demonstrates how the unit circle might be useful.

Over 100 handouts with answer sheets you can print and use to help build English vocabulary. Numerous topics and themes are covered: everyday words, math terms, seasonal and holiday words, geographical terms, animals, opposites, parts of...