Math Problem Statement
กำหนดรูปสี่เหลี่ยม ABCD เป็นรูปสี่เหลี่ยมที่แบบในวงกลม O โดย ∠CDB = 50° แล้ว ∠DAC มีค่าเท่าใด ∠ABD = 35° , ∠BCA = 45°
Solution
This problem appears to involve the geometric properties of a quadrilateral ABCD with certain given angles. The question asks for the measure of angle DAC, given specific angles in the figure.
Let's break down the given information:
- ∠CDB = 50°
- ∠ABD = 35°
- ∠BCA = 45°
Based on this, we need to figure out what angle ∠DAC is.
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Math Problem Analysis
Mathematical Concepts
Geometry
Angles in a Circle
Quadrilaterals
Angle Properties
Formulas
Angle sum property in a quadrilateral
Angles in a cyclic quadrilateral
Theorems
Angle sum property
Cyclic quadrilateral properties
Suitable Grade Level
Grades 9-11