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Vlad1618 [11]
3 years ago
8

Helppppppp me please

Mathematics
1 answer:
STALIN [3.7K]3 years ago
6 0

Given:

In \Delta QRS, \overline{QR}\cong \overline{SQ} and m\angle Q=114^\circ.

To find:

The m\angle S.

Solution:

In \Delta QRS,

\overline{QR}\cong \overline{SQ}

It means the triangle QRS is an isosceles triangle. We know that the base angles of an isosceles triangle are congruent and their measures are equal.

\angle R\cong \angle S      [Base angles of isosceles triangle QRS]

m\angle R=m\angle S            ...(i)

In \Delta QRS,

m\angle Q+m\angle R+m\angle S=180^\circ

m\angle Q+m\angle S+m\angle S=180^\circ        [Using (i)]

114^\circ+2m\angle S=180^\circ

2m\angle S=180^\circ-114^\circ

2m\angle S=66^\circ

Divide both sides by 2.

m\angle S=\dfrac{66^\circ}{2}

m\angle S=33^\circ

Therefore, the m\angle S is 33 degrees.

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