# help me pls geometry

Which tirangles must be similar
1. Two right triangles with a congruent acute angle
2. Two obtuse angles
3 Two isosceles triangles with congruent bases
4. Two scalene triangles with a congruent angle

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1. #1. If the acute angle is equal, then all the angles are equal.

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posted by Steve
2. After drawing four squares, Chen completed this chart showing the length of the sides of each square and the area of each square. According to Chen’s chart, if A is the area and s is the length of a side, what can you conclude is the formula for the area of a square?

Side Length Area
1 1
2 4
3 9
4 16

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3. A=s^2

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posted by Steve

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