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# Help! Thanks!

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(1) Let WZYZ be a trapezoid with bases XY andWZ. In this trapezoid,angle ZXW = 105,angle XWZ = 43 , and angle XYZ = 141. Find angle YXZ in degrees.

(2) In trapezoid EFGH,line EF is parallel to line GH  and  P is the midpoint of side line EH If the area of triangle \$PEF\$  is 8 , and the area of triangle \$PGH\$  is 21 , then find the area of trapezoid \$EFGH\$ .

(3) Quadrilateral ABCD  is a parallelogram. Let E  be a point on AB, and let F be the intersection of lines DE and BC. The area of triangle EBF is 1 and the area of triangle EAD  is 9 Find the area of parallelogram ABCD.

(4) In trapezoid  ABCD,  AB is paralell to CD, and  AB < CD. The base CD  has a length of 8 The legs  AD and BC have lengths of 7 and the diagonal BD  has a length of 9 Find the area of the trapezoid.

Thanks!

Aug 15, 2020

#1
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I've done these problems!

1. Angle YXZ = 46 degrees.

2. The area of trapezoid EFGH is 50.

Aug 15, 2020
#2
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hrm, those are both incorrect...

No worries... :)

Aug 15, 2020
#3
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(1) Let WZYZ be a trapezoid with bases XY and Z. In this trapezoid,angle ZXW = 105,angle XWZ = 43 , and angle XYZ = 141. Find angle YXZ in degrees.

1/     Angle YXZ = 32 degrees.

(2) In trapezoid EFGH, line EF is parallel to line GH  and  P is the midpoint of side EH. If the area of triangle PEF is 8, and the area of triangle PGH  is 21, then find the area of trapezoid EFGH.

2/    The area of a trapezoid EFGH is 58 units squared.

( I used the right trapezoid with side lengths: EF = 8,  GH = 21, and EH = 4 )

(3) Quadrilateral ABCD  is a parallelogram. Let E  be a point on AB, and let F be the intersection of lines DE and BC. The area of triangle EBF is 1 and the area of triangle EAD  is 9 Find the area of parallelogram ABCD.

3/   Area of parallelogram ABCD = 24 u2

(4) In trapezoid  ABCD,  AB is parallel to CD, and  AB < CD. The base CD  has a length of 8 The legs  AD and BC have lengths of 7 and the diagonal BD  has a length of 9 Find the area of the trapezoid.

4/    Area = 6√45

Aug 16, 2020
edited by Dragan  Aug 16, 2020
edited by Dragan  Aug 19, 2020