Check Similarity in Right Triangles Calculator

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One of the two shorter sides (legs) of the first right triangle.
The other shorter side (leg) of the first right triangle.
One of the two shorter sides (legs) of the second right triangle.
The other shorter side (leg) of the second right triangle.
SimilaritySimilar
Similar

Whether the two right triangles are similar

Scale factor (T2 / T1)2
Reflection neededNo reflection needed
Hypotenuse - Triangle 15
Hypotenuse - Triangle 210
Short leg - Triangle 13
Short leg - Triangle 26
Long leg - Triangle 14
Long leg - Triangle 28
Ratio 16 / 3 = 2
Ratio 28 / 4 = 2
Ratio 310 / 5 = 2

The two right triangles are similar with scale factor 2.

  • All three side ratios are equal: short legs 3/6, long legs 4/8, hypotenuses 5/10.
  • Triangle 2 is larger than Triangle 1 by a factor of 2. Each side of Triangle 2 is 2 times the corresponding side of Triangle 1.
  • Because all corresponding angles are equal (both have a right angle, plus two shared acute angles determined by the leg ratio), the AA (Angle-Angle) and SSS similarity criteria both confirm similarity.

Next stepUse the scale factor to find any missing side length in either triangle by multiplying or dividing the known corresponding side.

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