State the parts of corresponding sides and examine the congruency — task. Mathematics State Board, Class 7.

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In the following

$Δ$

$PQR$ ,

$PQ = PR$ and

$S$ is the mid-point of

$QR$ .

Ex_9.1.png

1. The pairs of equal parts in

$Δ$

$PSQ$ and

$Δ$

$PSR$ .

a.

$PS =$ .

b.

$∠SPQ = ∠$ .

2. Is

$QSP ≅ RSP$ ?

.

Answer variants:

NO

Yes

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