Find the value of x, y, z in the following diagram:
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Answers
Question Point.
If two angles in an isosceles triangle are equal, both angles are called base angles. The last remaining angle is called a vertex angle.
In a triangle, an external angle is equal to the sum of two angles that are not neighboring. [1]
Solution.
(A base angle.)
(An external angle of a triangle.)
(A vertex angle.)
Reason.
[1] Let two angles of a triangle be . The remaining angle is . Since external and internal angle sum to 180°, the external angle is the sum of two angles .
- Value of x.
- Value of y.
- Value of z.
As we know that,
✯ If two sides of a triangle are equal, then their corresponding angles are also equal to each other.
In ∆ABC,
Thus,
✔ Their corresponding angles are also equal.
According to the question,
Again,
In ∆ABC,
➠
➠
➠
➠
➠
As we know that,
✔ Angle made by a straight line is always 180°.
Now,
In ∆BCD,
Again,
In ∆BCD,