Inscribed Angles Tangents. Notes 27 – Sections 10.4 & 10.5. Essential Learnings. Students will understand and be able to find measures of inscribed angles and intercepted arcs. Vocabulary. Inscribed angle – an angle with the vertex on a circle and sides are chords in a circle.
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Notes 27 – Sections 10.4 & 10.5
Tangent – a line in the same plane as a circle that intersects the circle in exactlyone point called the point of tangency.
Common tangent – a line, ray, or segment that is tangent to two circles in the same plane.
In a plane, a line is tangent to a circle if and only if it is perpendicular to a radius drawn to the point of tangency.
Determine whether XY is tangent to the circle.
If two segments from the same exterior point are tangent to a circle, then they are congruent.
Find x. Assume that segments that appear to be tangent are tangent. Round to the nearest tenth.
A polygon is circumscribed about a circle if every side of the polygon is tangent to the circle.
Find the value of x. Then find the perimeter.
p.713: 11 – 20, 23 – 30, 36
p. 722: 13 – 22, 24 – 27, 30
Unit Study Guide 9