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Arcs and Chords - YourTeacher.com - Geometry Help
By yourteachermathhelp
Although circumference and area cover most of the problems on the SAT/ACT, you might also encounter questions involving arc length and chords. Watch the solution to this question to see how to use the information you're given to set up equations you're familiar with, like the pythagorean theorem.
10.6 More Angle-Arc Theorems (Practice)
By AutenMath
A lesson on 1.) the relationship of inscribed and tangent-chord angles with the same or congruent arcs 2.) the measure of an inscribed angle whose intercepted arc is a semicircle and 3.) the relationship of tangent-tangent angles and their minor arcs
Inscribed Angles - YourTeacher.com - Geometry Help
By yourteachermathhelp
Students learn the definition of an inscribed angle, and that the measure of an inscribed angle is equal to ½ the measure of its intercepted arc. Students also learn the following theorems related to inscribed angles. If two inscribed angles intercept the same arc, then the angles are congruent. An angle inscribed in a semicircle is a right angle. If a quadrilateral is inscribed in a semicircle, then opposite angles are supplementary. The measure of an angle formed by a chord and its tangent is half the measure of the intercepted arc. Students are then asked to find the missing measures of arcs and angles in given circles using these theorems.