wiz-icon
MyQuestionIcon
MyQuestionIcon
2
You visited us 2 times! Enjoying our articles? Unlock Full Access!
Question

In a ΔABC, D and E are points on the sides AB and AC respectively such that DE||BC.
If AD=8x7,DB=5x3,AE=4x3 and EC=(3x1), find the value of x.

Open in App
Solution

InΔADE&ΔABCA=A&ADE=ABCΔADEΔABC[AAsimilarity]ADAB=AEAC8x78x7+5x3=4x34x3+3x1(8x7)(7x4)=(4x3)(13x10)56x232x49x+28=52x240x39x+3056x281x+2852x2+79x30=04x22x2=02x2x1=02x22x+x1=02x22x+x1=02x(x1)+1(x1)=0(2x+1)(x1)=02x+1=0andx1=0x=12andx=1sincelengthcannotbevex=1.
1206726_1313486_ans_45ee75bb9084442db622c4c236e9b8ed.PNG

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Criteria for Similarity of Triangles
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon