9 grade maths> What is angle ABD????...

What is angle ABD????

Ashwin Satheesh , 11 Years ago

Grade 9

5 Answers

Sumit Majumdar

Dear student,
From the figure, we can only infer that $\angle ABD=\angle BAC+70^{\circ}$ .
We need some relation between the other set of angles to proceed further.
Regards
Sumit

Last Activity: 11 Years ago

Saloni Rakholiya

are AE and DC parallel??

Last Activity: 11 Years ago

SHAIK AASIF AHAMED

Hello student,
Please find my response to your question below
From Given diagram it has incomplete data to find out the angle BAD i think some conditions like whether AE and DC are parallel or some more information is required to solve this problem.So recheck your question and post it again so that i can provide you a meaningful answer.

Last Activity: 11 Years ago

Ashwin Satheesh

but sir this was the question from the book r d sharma

lesson lines and angles.....

please advice what to do

Last Activity: 11 Years ago

SHAIK AASIF AHAMED

Hello student,
Please find the answer to your question below
Let the extension of line DC be F
70+ $\angle$ EAB+ $\angle$ BAC=180(linear pair)
$\angle$ EAB+ $\angle$ BAC=110
$\angle$ EAC= $\angle$ ACF(alternate angles)
$\angle$ EAC+70=180(linear pair)
$\angle$ EAC=110
so $\angle$ ACF=110
we can see $\angle$ ACF= $\angle$ ABD (exterior angles)
so $\angle$ ABD=110