Download Practice for 7th grade due Jan 11

Practice (Angles and Triangles) for 7th grade
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4. Draw a picture to answer this question, please.
5. Triangle ABC is congruent to triangle DEF, and AB = BC. Which of the
following do you know to be true?
6. List all angles with the same measure as !1 .
7. Classify the triangle by the lengths of its sides: 6 m, 8 m, and 10 m.
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10. Each angle of a regular polygon measures 108°. How many sides does
the polygon have?
11. Name the quadrilateral. Use the most specific name.
a. A quadrilateral with 2 pairs of parallel sides
b. A quadrilateral with 2 pairs of parallel sides and 4 sides of equal length
c. A quadrilateral with 4 right angles and 2 pairs of parallel sides
d. A quadrilateral with 1 pair of parallel sides
12. Tell whether a triangle is acute, right, or obtuse
13. Let lines l and m are parallel lines ( l || m ) and line t is a transversal.
Name all pairs of
(a) corresponding angles;
(b) alternate interior angles;
(c) same side interior angles;
(d) alternate exterior angles;
(e) Vertical angles
(f) What is the relation between same
side interior angles?
14. Find the sought angles:
(a)
(b)
(c)
15. Tell whether the angles are complementary, supplementary, or nether:
16. Answer the following questions:
17. The quadrilateral KLMN is congruent to the quadrilateral SPQR.
(a) Name four pairs of congruent angles:
(b) Find m!S
(c) Find m!R
(d) Find length of NK
18. How many diagonals does a decagon have?
19. How many diagonals does a dodecagon have?
20. What is a single angle measure of a regular decagon? Dodecagon?
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triangle or trigon
quadrilateral or tetragon
pentagon
hexagon
heptagon
octagon
Enneagon or nonagon
decagon
hendecagon
dodecagon
triskaidecagon or tridecagon
tetrakaidecagon or
tetradecagon
pendedecagon
hexdecagon
heptdecagon
octdecagon
enneadecagon
icosagon
After about 6 sides mathematicians usually refer to these polygons as ngons. So your 13 sided polygon I would call a 13-gon.