Finding the missing angle measure
Angles with algebra day one.notebook
December 01, 2016
Finding the missing angle measure
using algebra 320
Earlier this week our angles looked like this!
x0
What should we do now????
2x + 20
4x
Solve for the missing angle measures
Equation Solve for x
(5x
+
o 7)
48o
Find (5x + 7)
Angles with algebra day one.notebook
Solve for the missing angle measures Equation Solve for x
December 01, 2016
10 + 2x 3x 85
Find 2x + 10 and 3x - 85
To Solve for missing angle measures using algebra
Step 1: Figure out if the angles given are congrsuaemnet, supplementary (180) or complementary(90) Step 2: Set up an equation that relates the angles
If congruent set the measures equal
If complementary
add the measures & set them equal to
90
Step 3: Then solve for x Step 4: Find missing angle measures
If supplementary
add the measures & set them equal to
180
Angles with algebra day one.notebook
Find the missing angle measures Equation Solve for x
December 01, 2016
2x - 10 65 - x
2x - 10
65 - x
Solve for angle 1 and angle 2 Equation solve for x
1
(x + 40)o
2 (2x + 20)o
Angles with algebra day one.notebook Name___________________________ Date____________ Math 8 Angles: Using Algebra 1. Patty is making a quilt following the pattern shown below.
Show your work.
(2x + 50) (3x)
December 01, 2016
If all the horizontal lines are parallel, what is the value of x?
Answer____________________
___ 2. In the figure below, DC intersects BA at point B.
D
A
5x + 20
3x B
What is the measure, in degrees, of ABC? C
Show your work.
Answer_________ degrees
Angles with algebra day one.notebook
December 01, 2016
3. The figure below shows parallel lines cut by a transversal.
y
z
x
w
a
d 75
b
Part A Based on the information in the figure, complete the table below with the
measures of each angle
Angle
a
b
d
w
x
y
z
Degree Measure
Part B Name one pair of supplementary angles.
Answer____________________
4. In the figure below, lines m and n are parallel. Line l is a transversal.
(8x) m
B
(3x + 40)
Part A What is the value of x? Show your work.
n A
l
Answer_________________
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