Find the characters of a trapezium Group activity

Group activity Now make your own trapezium

Fill in the blanks ① ② Quadrilateral ③ ⑥ ④ ( ①③④⑤⑥ ⑤ )

Say the names of all parts upper base side ① side upper base ⑤

upper base lower base From a point on the upper base, we can draw

Draw the height of each trapezium： h h h From “B” draw the height

In a trapezium, if there is a right angle, we call it a right

True or false 1)There are only two heights in a trapezium. （× ） 2)

play：Use scissors to cut the triangle once to make a trapezoid.

Use scissors to cut the parallelogram once to make a trapezoid. play：

Slides: 19

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Find the characters of a trapezium

Group activity Now make your own trapezium

Fill in the blanks ① ② Quadrilateral ③ ⑥ ④ ( ①③④⑤⑥ ⑤ ) A quadrilateral with one pair of parallel opposite sides （ ①④⑤⑥ ） A quadrilateral with only one pair of parallel opposite sides trapezium ( ①④⑤ )

Say the names of all parts upper base side ① side upper base ⑤ ④ lower base side lower base What’s the difference between the bases and the sides?

upper base lower base From a point on the upper base, we can draw a perpendicular line segment toward the lower base. The perpendicular line segment is the height of this trapezium.

Draw the height of each trapezium： h h h From “B” draw the height A From“A”draw the height h D h B C

Which height is right？

In a trapezium, if there is a right angle, we call it a right angle trapezium.

True or false 1)There are only two heights in a trapezium. （× ） 2) Upper base must be longer than lower base. （× ） 3)There are two right angles in a right angle trapezium. √）（

play：Use scissors to cut the triangle once to make a trapezoid.

Use scissors to cut the parallelogram once to make a trapezoid. play：