b) a:b=1 : 2 and b: c=23
Find: -(1) a b c (11) ac
Answers
Answer:
7th
Maths
The Triangle and Its Properties
Recalling Basics of Triangles and Its Types
In a Δ ABC , if a2 + b2 + c...
MATHS
In a ΔABC, if a
2
+b
2
+c
2
=ac+
3
ab, then the triangle is
MEDIUM
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VIDEO EXPLANATION
ANSWER
a
2
=b
2
+c
2
−2bccosA
b
2
=a
2
+c
2
−2accosB
c
2
=b
2
+a
2
−2bacosC
Adding above three equation and rearranging
2bccosA+2accosB+2abcosC=a
2
+b
2
+c
2
From the question
ac+
3
ab=a
2
+b
2
+c
2
⟹cosA=0,cosB=
2
1
,cosC=
2
3
So ∠A=90 degrees
So △ABC is right angles and not isoceles
Step-by-step explanation:
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Question From class 14 Chapter SIMPLIFICATION
then the value of
is
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Text Solution
3
6
9
2
Answer :
B
Solution :
<br>
<br>
<br> Found the value of
&
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