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All triangles have 3 interior angles that add up to 180 degrees and they are:-
Right angle triangle: 90 degree angle and 2 acute angles
Obtuse triangle: An obtuse angle and 2 acute angles
Scalene triangle: 3 acute angles of different sizes
Isosceles triangle: 2 equal angles and another angle
Equilateral triangle: 3 equal angles that each measures 60 degrees
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What kind of triangles does the Pythagorean theorem work for?
All right-angles triangles. That is triangles that contain one angle at 90 degrees.
How do you prove triangles similar?
To prove that two or more triangles are similar, you must know either SSS, SAS, AAA or ASA. That is, Side-Side-Side, Side-Angle-Side, Angle-Angle-Angle or Angle-Side-Angle. If the sides are proportionate and the angles are equal in any of these four patterns, then the triangles are similar.
What is the type of congruence between the triangles shown?
side- angle- side
What are the three methods of proving triangles congruent?
SSS- side side side SAS- side angle side ASA- angle side angle There is also: AAS- angle angle side For right triangles: HL- hypotenuse leg
Are all 30-60-90 triangles isosceles?
No because 30-60-90 triangles are right angle triangles
