News
Get Premium
Dashboard

Dashboard Sign out
Big Ideas Math: Modeling Real Life, Grade 7
BI
Big Ideas Math: Modeling Real Life, Grade 7 View details
5. Finding Unknown Angle Measures
Continue to next subchapter
search

Exercise 20 Page 395

What is the sum of the measures of two complementary angles?

Classification: Complementary angles.
Value of x: 55

Practice makes perfect
First, let's take a look at the given diagram.

We have been given a pair of complementary angles and their measures written as algebraic expressions. Since the angles are complementary, we know that the sum of their measures should equal 90^(∘). We can solve for x by creating an equation using the expressions for the two smaller angles and their sum. x^(∘) + 35^(∘) = 90^(∘) ⇒ x^(∘) = 55^(∘)

Subchapter links expand_more
arrow_right Try It p.390-392
1
Try It 2 (Page 391)
Try It 3 (Page 391)
Try It 4 (Page 391)
Try It 5 (Page 392)
Try It 6 (Page 392)
Try It 7 (Page 392)
arrow_right Self-Assessment for Concept & Skills p.392
Self-Assessment for Concept & Skills 8 (Page 392)
Self-Assessment for Concept & Skills 9 (Page 392)
Self-Assessment for Concept & Skills 10 (Page 392)
11
arrow_right Self-Assessment for Problem Solving p.393
12
13
14
arrow_right Review & Refresh p.394
Review & Refresh 1 (Page 394)
Review & Refresh 2 (Page 394)
Review & Refresh 3 (Page 394)
Review & Refresh 4 (Page 394)
Review & Refresh 5 (Page 394)
arrow_right Concept, Skills, & Problem Solving p.394-396
Concept, Skills, & Problem Solving 6 (Page 394)
Concept, Skills, & Problem Solving 7 (Page 394)
Concept, Skills, & Problem Solving 8 (Page 394)
Concept, Skills, & Problem Solving 9 (Page 394)
Concept, Skills, & Problem Solving 10 (Page 394)
Concept, Skills, & Problem Solving 11 (Page 394)
12
Concept, Skills, & Problem Solving 13 (Page 394)
Concept, Skills, & Problem Solving 14 (Page 394)
Concept, Skills, & Problem Solving 15 (Page 394)
Concept, Skills, & Problem Solving 16 (Page 394)
Concept, Skills, & Problem Solving 17 (Page 394)
Concept, Skills, & Problem Solving 18 (Page 394)
19
Concept, Skills, & Problem Solving 20 (Page 395)
Concept, Skills, & Problem Solving 21 (Page 395)
Concept, Skills, & Problem Solving 22 (Page 395)
Concept, Skills, & Problem Solving 23 (Page 395)
Concept, Skills, & Problem Solving 24 (Page 395)
Concept, Skills, & Problem Solving 25 (Page 395)
Concept, Skills, & Problem Solving 26 (Page 395)
Concept, Skills, & Problem Solving 27 (Page 395)
Concept, Skills, & Problem Solving 28 (Page 395)
29
30
31
Concept, Skills, & Problem Solving 32 (Page 395)
Concept, Skills, & Problem Solving 33 (Page 395)
Concept, Skills, & Problem Solving 34 (Page 395)
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Concept, Skills, & Problem Solving 50 (Page 396)