Kiem tra 15 phut toan song ngu lop 8

TEST 15 MINUTES

A. What dose this word mean?
1. diagonal:
2. trapizoid:
B. Translate into English:
1. Hình thang cân có hai cạnh bên bằng nhau.
2. Hình bình hành có các cạnh đối bằng nhau.
C. Do exercise by English:
Given trapezoid ABCD (AB //CD). E is the midpoint of AD, F is the midpoint of BC. Draw FG//AD (G
DC).
a, Prove that: Quadrilateral EFGD is a parallelogram.
b, Given point K lies on the opposite ray of the ray FK such that FK=GC; I is the midpoint of FC. Prove that three points G, I, K are collinear.












TEST 15 MINUTES

A. What dose this word mean?
1. midsegment:
2. parallelogram:
B. Translate into English:
1. Hình thang cân có hai đường chéo bằng nhau.
2. Tứ giác có các góc đối bằng nhau là hình bình hành.
C. Do exercise by English:
Given parallelogram ABCD , E symmetric to A with respect to DC. Draw the line d such that d through A, parallel to DC and d intersects BC at F. Prove that quadrilateral CDEF is an isosceles trapezoid.