triangles geometry Flashcards
What are triangles?
Shapes with 3 sides and 3 angles.
What is a right triangle?
A triangle that has one right angle.
What defines an acute triangle?
All angles are less than 90 degrees. and has an acute angle
What is an obtuse triangle?
A triangle that has one angle more than 90 degrees. and has an obtuse angle
What characterizes an equilateral triangle?
All sides are equal.
What is an isosceles triangle?
A triangle that has two sides that are equal.
What defines a scalene triangle?
All sides are different lengths.
Can triangles be classified in more than one way?
Yes, triangles can be classified by both angles and sides.
Can an isosceles triangle be acute or obtuse?
Yes, an isosceles triangle can be either acute or obtuse.
What type of triangle is always acute?
An equilateral triangle.
What is the sum of the angles in a triangle?
180 degrees.
If two angles in a triangle are 35 and 45 degrees, what is the third angle?
100 degrees.
Fill in the blank: The angles in a triangle always add up to ______.
180 degrees.
