in cyclic quadrilater A B C D LA = 650
then what is the measure of angles C
Answers
Answer:
Step-by-step explahe angles between two straight lines, let us now study the angles
made by arcs and chords in a circle and a cyclic quadrilateral.
19.2 OBJECTIVES
After studying this lesson, the learner will be able to :
z prove that angles in the same segment of a circle are equal
z cite examples of concyclic points
z define cyclic quadrilaterals
z prove that sum of the opposite angles of a cyclic quadrilateral is 180°
z use properties of a cyclic quadrilateral
z solve problems based on Theorems (proved) and solve other numerical problems based
on verified properties.
19.3 EXPECTED BACKGROUND KNOWLEDGE
z Angles of a triangle
z Arc, chord and circumference of a circle
z Quadrilateral and its types
19.4 ANGLES IN A CIRCLE
Central Angle. The angle made at the centre of a circle by the
radii at the end points of an arc (or a chord) is called the central
angle or angle subtended by an arc (or chord) at the centre.
In Figure 19.1, ∠POQ is the central angle made by nation: