Question

find the angle marked with letter. o is centre of the circle​

Answer 1

Answer:

Step-by-step explanation:

Given:

Label the Diagram Such that

O is the center of a Circle,

AB is the Diameter of a Circle,

∠B = 28°

To Find:

∠A = y = ?

Solution:

AB is the Diameter of a Circle      ..........Given

Diameter of a Circle Subtends a Right Angle,

Therefore,

m∠C = 90°

Triangle sum property:

In a Triangle sum of the measures of all the angles of a triangle is 180°.

Now in ΔABC,

∠A+∠B+∠C = 180°

y+50+60=180

y=70

Therefore,

Measure angle y is 70°.