Q: A right angle triangle has one 90 true or false?

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It is true because a triangle with a right angle and two acute angles is a right angle triangle.

It is true

It is true and the longest side of a right angle triangle is its hypotenuse.

It is true.

A right angle triangle can be scalene. Such a triangle has one right angle, two other unequal angles and no equal sides

True

True.

False. That is a right (-angled) triangle. An acute triangle has all three angles less than 90o

false

Sounds true to me, all three angles are congruent...

True

False ------------------------------------ An acute triangle is one in which all angles are acute angles. An acute angle is less than 90°. A right angle is 90°, which is equal to 90° not less than 90° Therefore all the angles of a right triangle are not all acute Thus a right triangle is not an acute triangle.

true

false

False because sine ratio = opposite/hypotenuse

False

It is a right angle triangle or an isosceles right angle triangle

True

True

FALSE because a rectangle has 4 right angles.

In Euclidean geometry, a triangle must be one of these: acute, obtuse, or right. Maybe there is a non-Euclideangeometry for which some obtuse triangles can contain a right angle, but it doesn't happen in Euclidean geometry.

True

False

Yes, the definition of a right triangle is that it has a 90 degree angle

False it can have more

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