Download math

30
20
40
Angle
Measure
An acute
triangle are 3
angles that are
less than 90
degrees.
Real Life example:
60
60
60
Angle
Measure
A Equiangular Triangle,
has 3 congruent acute
angles less than 90
Real Life example:
degrees.
90 degrees
The Right triangle
is a triangle that
has the angle of Real Life example:
90 degrees.
90 degrees
Angle
Measure
An Obtuse Triangle is
a triangle that it’s
measures are over 90
degrees.
Real Life example:
Angle
Measure
We use this types of triangles to put them into
categories of measurements, the triangles can be put
into categories depending on the degrees that the
triangles have.
Triangle ADB
CLASSIFY
(example)
Angle ADC is a right
angle. Triangle ADC is a
right triangle.
A
40
D
40
70
B
Triangle ABD
Angle ABD & Angle DBC form a linear pair and
they are supplementary.
So m.Angle ABD + m.Angle BDC = 180.
Substitute: m.Angle ABD + 70 =180
180 – 70 = 110, so m.Angle ABD = 110.
The Triangle ABD is an Obtuse Triangle because
the degree is over 90.
70
C
CLASSIFY (example)
1. Obtuse Triangle
2. Right Triangle
3. Acute Triangle
4. Equiangular Triangle
130
An Equilateral
Triangle is a
triangle with 3
congruent sides.
Side
Lengths
Real Life example:
An Isosceles Triangle has 2
congruent sides instead of
all of them being
congruent.
Side
Lengths
Real Life example:
Side
Lengths
An Scalene Triangle is
a triangle that has no
congruent sides at
all.
Real Life example:
CLASSIFY
(example)
D
Triangle DEF
17
20
In the figure, DE is congruent DF.
So DF = 20,
And triangle DEF is Equilateral.
E
20
Triangle DEG
Using the Segment + P. we can see that
EG = EF + FG.
Substitute 20 + 5 = 25
Triangle DEG is Scalene because none of the sides are congruent.
F 5
G
CLASSIFY
(example)
2x + 6.8 = 8x + 1.4
-8x
-8x
-6x + 6.8 = 1.4
-6.8 -6.8
-6x = -5.4
/-6 /-6
X = 0.9
2x + 6.8
8x + 1.4
2(0.9) + 6.8 = 8.6
8(0.9) + 1.4 = 8.6
CLASSIFY
(example)
6y
2y = 4y + 12
-4y -4y
2y = 12
/2 /2
y=6
6(6) = 36
4(6) + 12 = 36
36 = 36
4y + 12