What is the value of the angle formed by intersection of bisectors of any two adjacent angles of a rhombus ? *
1 point
90 degree
25 degree
30 degree
105 degree
Answers
Answer:
90 degree is the correct answer.
Step-by-step explanation:
In a parallelogram, opposite angles are congruent (i.e. are of equal length). Also, the opposite angles are of same measure. Whereas the adjacent angles are supplementary (add up to 180 degrees).
Let a and b be measures of any two adjacent angles of a parallelogram,
⟹ a+b=180°......(1)
After bisecting the angles with measures a and b we get the measures of that angles as a/2 and b/2
respectively.
→ From (1), we get
(a+b)/2=180°/2⟹ a/2 + b/2 = 90°
Now, the bisectors will form a triangle and sum of the angles of a triangles is 180°
∴ Measure of angle formed by bisectors = 180 − 90=
→ 90°
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