TRIANGLES

1
TRIANGLES

• SPI 6.4.1
• Identify, define or describe geometric shapes
  given a visual representation or written
  description of its properties

2
TRIANGLE

• A triangle is a polygon with three sides and
  three angles.

3
The sum of the angles of a triangle is 180
because a triangle is half of a quadrilateral.
4
The sum of the measures of the angles of a
triangle is 180.

• Angle 1 angle 2 angle 3180

1
2
3
5
If angle 130, angle 2100, what would angle 3
equal?
50
6
An acute triangle has all acute angles. (All
angles are less than 90 degrees.)
7
A right triangle is a three sided figure with
one right angle.
90
8
An obtuse triangle has one obtuse angle (an angle
that is more than 90).
9
A scalene triangle is a three sided figure that
has no angles or sides equal.
10
An isosceles triangle has two sides and two
angles equal.
11
An equilateral triangle has equal sides and equal
angles.
12
A plane had wings that are shaped like triangles.
Find the missing measure.
40
X
50x