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Published on: 16/06/2021
QB365 provides detailed and simple solution for every book back questions in class 7 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 7th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
With the given data in the Figure, find ㄥUWY. What do you infer about ㄥXWV?
2.
In the given isoceles triangle IJK (Figure), if ㄥIKL = 1280, find the value of x.
3.
In the ΔABC shown in the figure, find the angel z.
4.
In ΔLMN, LM is extended to O. If ㄥL = 620 and ㄥN = 310, find ㄥNMO.
5.
In ΔSTU, if SU = UT, ㄥSUT = 700, ㄥSTU = x, find the value of x.
1.
Exterior angle = sum of two interior opposite angles
6y + 2 = 260 + 360
6y + 2 = 620
Subtract 2 from both sides
6y = 62 − 2
6y = 600
\(\frac { 6y }{ 6 } =\frac { 60 }{ 6 } \) [on both sides, divide by 6]
y = 100
ㄥUWY = 6y + 2 = 6(10) + 2 = 620 .
We can conclude that ㄥXWV = ㄥUWY, because they are vertically opposite angles as well as exterior angles.
2.
Exterior angle = sum of two interior opposite angles
1280 = x + x
128 = 2x
\(\frac { 128 }{ 2 } =\frac { 2x }{ 2 } \) [on both sides, divide by 2]
x = 640
3.
Exterior angle = sum of two interior opposite angles
1350 = z + 400
Subtract 400 on both sides
1350 − 400 = z + 400 − 400
z = 950
4.
Let, ㄥNMO = y
Exterior angle = sum of two interior opposite angles
y = 620 + 310
= 930
5.
Given, ㄥSUT = 700
ㄥUST = ㄥSTU = x [Angles opposite to equal sides]
ㄥSUT + ㄥUST + ㄥSTU = 1800
700 + x + x = 1800
700 + 2x = 1800
2x = 1800 – 700
2x = 1100
x = \(\frac { { 110 }^{ 0 } }{ 2 } \) = 55°
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
