Math Problem Statement

Perhatikan lingkaran O di samping. Diketahui m∠BAD dan m∠BCD berturut-turut adalah (2x+10) dan (3x+20), maka nilai mzBOD minor adalah

Solution

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles in a Circle
Arc Measure

Formulas

Sum of two inscribed angles facing the same arc equals half of the central angle: m∠BAD + m∠BCD = (1/2) * m∠BOD

Theorems

Inscribed Angle Theorem: The measure of an inscribed angle is half the measure of the central angle that subtends the same arc.

Suitable Grade Level

Grades 10-12