Four mark example problems X — task. Mathematics State Board, Class 8.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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$A$ is the midpoint of

$RU$ and

$T$ is the midpoint of

$RN$ , prove that

$\triangle RAT \sim \triangle RUN$ .

Proof:

	Statements	Reasons
1	$\angle ART = \angle URN$
2	$RA = AU = \frac{1}{2}RU$
3	$RT = TN = \frac{1}{2}RN$
4	$\frac{RA}{RU} = \frac{RT}{RN} = \frac{1}{2}$
5	$\triangle RAT \sim \triangle RUN$

Answer variants:

by ASA (1 and 4)

The sides are proportional from

$2$ and

$3$ .

$T$ is the midpoint of

$RN$

$\angle R$ is common in

$\triangle RAT$ and

$\triangle RUN$

$A$ is the midpoint of

$RU$

The sides are proportional from

$1$ and

$2$ .

by SAS (1 and 4)

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14. Four mark example problems X