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Transcript 
The World Of Triangles
Triangles

A triangle is a 3sided polygon.
Every triangle has
three sides and
three angles. When
added together, the
three angles equal
180°.
Right Triangles

A right triangle is
triangle with an
angle of 90°.
Scalene Triangles

A triangle with
three unequal
sides.
Isosceles Triangles

An isosceles
triangle is a triangle
with (at least) two
equal sides.
Equilateral Triangles

An equilateral
triangle is a triangle
with all three sides
of equal length.
Congruent Triangles


Congruent triangles
are triangles whose
corresponding
angles and sides
are congruent.
They are exactly
the same size and
shape.
The Hypotenuse

The hypotenuse of
a right triangle is
the triangle's
longest side, i.e.,
the side opposite
the right angle.
The Pythagorean Theorem

For a right triangle
with sides a and b
and hypotenuse c,
a2+b2=c2.
Triangle Quiz

Please complete the following quiz that
covers the information that was just
presented to you.
Question 1

If a triangle has
three unequal sides
it is a ______
triangle.



A) Scalene
B) Obtuse
C) Isosceles

Answer:

A) Scalene
Question 2

A triangle with (at
least) two equal
sides is a ______
triangle.



A) Scalene
B) Isosceles
C) Congruent

Answer:

B) Isosceles
Question 3

Two triangles that
are equal are
called ______
triangles



A) Acute
B) Obtuse
C) Congruent

Answer:

C) Congruent
Question 4

A triangle with all
three sides of equal
length is a ______
triangle.



A) Equilateral
B) Right
C) Equiangular

Answer:

A) Equilateral
Question 5

A triangle with an
angle of 90° is a
______ triangle.



A) Acute
B) Right
C) Congruent

Answer:

B) Right
Question 6

What is the
Hypotenuse of a
right triangle?



A) The smallest
angle.
B) The side
opposite the right
angle.
C) The right angle.

Answer:

B) The side
opposite the right
angle.
Question 7

The Pythagorean
Theorem states …



A) pr2
B) (a+b)2/2=c
C) a2+b2=c2

Answer:

C) a2+b2=c2
Question 8

Use the
Pythagorean
Theorem to solve
the following:



a= 5
b = 12
c=?

Answer:

c = 13
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