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NAME _____________________________________________ DATE ____________________________ PERIOD _____________
Chapter 4 Mid-Chapter
(Lessons 4-1 through 4-4)
Part I Write the letter for the correct answer in the blank at the right of each question.
1. Use a ruler to measure each side and a protractor
to measure each angle. Which best describes the
type of triangle?
1.______________________
A acute scalene
B obtuse equilateral
C acute isosceles
D obtuse isosceles
Find the missing angle measures.
2. ______________________
2. What is m∠ 1?
F 50
G 60
H 100
J 105
3. ______________________
3. What is m∠ 2?
A 40
B 50
C 60
D 100
4. ______________________
4. If △SJL ≅ △DMT, which segment corresponds to ̅̅̅
𝐿𝑆 ?
F ̅̅̅̅
𝐷𝑇
G ̅̅̅̅
𝑇𝐷
H ̅̅̅̅̅
𝑀𝐷
J ̅̅̅̅̅
𝑀𝑇
Part II
5. Find the measures of the sides of △ABC with vertices A(1, 3), B(5, –2), and
C(0, –4). Classify the triangle by its sides.
Chapter 4
59
5. ______________________
Glencoe Geometry
NAME _____________________________________________ DATE ____________________________ PERIOD _____________
6. Determine which postulate can be used
to prove that the triangles are congruent.
If it is not possible to prove congruence,
write not possible.
6. ______________________
7. What is the maximum number of acute angles that a triangle can have?
7. ______________________
8. Determine whether △DEF ≅ △JKL, given that D(2, 0), E(5, 0), F(5, 5),
J(3, –7), K(6, –7), and L(6, –2).
8. ______________________
Chapter 3
2
Glencoe Algebra 1