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Flashcards in Geometry Deck (11):
1

If two or more angles lie on a straight line, they =

180 degrees

2

For any triangle, the sum of the 3 angles inside the triangle is what?

180 degrees

3

The longest side of a triangle is opposite what?

The largest angle

4

The shortest side of a triangle is opposite what?

The smallest angle

5

In any triangle, the sum of any 2 sides is what?

Greater than the 3rd side

6

If you are given 2 sides of a triangle, how would you determine the 3rd?

Must be more than the difference of the 2 sides and less than the sum of the 2 sides

7

How many acute angles in a triangle?

2 and the 3rd could be acute, obtuse or right

8

What is an isosceles triangle?

2 or more sides are equal, therefore it has 2 equal angles opposite the equal sides.

9

Isosceles triangle can have what kind of angles?

obtuse and 90 degree

10

What is the main characteristic of an equilateral triangle?

it always has three 60 degree angles

11

What is the area formula for a triangle?

A= 1/2(b*h)