H-Geom Flashcard 4 - Correct

Front

An OBTUSE triangle has _____________.

Back

1 obtuse angle.

Front

∆? ≅ ∆?

Back

∆TOS≅ ∆YOS.

Front

In ∆ DOG, ∠O is called the ?

Back

vertex angle.

Front

If ∠E is a RT ∠, m∠ H = 4x - 15, and m∠N = 2x – 9, then m∠H= ?° (Note ∠H and ∠N are complimentary)

Back

61°.

Front

An ISOSCELES triangle has _____________.

Back

at least 2 congruent sides.

Front

What is the definition of an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

What is the definition of an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a vertex in a triangle?

Back

The point where two sides of a triangle meet.

Front

What does it mean for two triangles to be congruent?

Back

They have the same size and shape, with corresponding sides and angles being equal.