8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - வினைமுற்று Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - மயங்கொலிகள் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை -பட்டமரம் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - இயற்கையை போற்றுவோம் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 1 - தமிழ் இன்பம் - ஆழிக்கு இணை Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2-ஈடில்லா இயற்கை - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 8 Maths subject.It will helps to get more idea about question pattern in every book back questions with solution.
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Questions + Answers key
Take MCQ Maths Test1.
Find the area of a rectangular plot of land shown in the figure.
2.
A junction where two roads intersect at right angles is as shown in the figure. Find AC if AB = 8 m and BC = 15 m.
3.
A 20- feet ladder leans against a wall at height of 16 feet from the ground. How far is the base of the ladder from the wall?
4.
Can a right triangle have sides that measure 5cm, 12cm and 13cm?
5.
In the figure, AB ⊥ AC
a) What type of Δ is ABC?
b) What are AB and AC of the Δ ABC?
c) What is CB called as?
d) If AC = AB then, what is the measure of ㄥB and ㄥC?
1.
Here, the hypotenuse is 29 m. One side of the right triangle is 20 m. let the other side be ‘l’ m Therefore, by Pythagoras theorem,
l2 = 292 − 202 = 841 − 400 = 441 = 212
∴ l = 21m
Therefore, the area rectangular plot of land = l × b square units. = 20 × 21 = 210 m2.
2.
Now Δ ABC is right angled.
Therefore, by Pythagoras theorem,
AC2 = AB2 + BC2
⇒ AC2 = 82 +152 = 64 + 225 = 289
AC2 = 172
⇒ AC = 17m.
Therefore, the length of the diagonal of the two intersecting roads is 17 m.
3.
The ladder, wall and the ground form a right triangle with the ladder as the hypotenuse. From the figure, by Pythagoras theorem,
202 = 162 + x2
⇒ 400 = 256 + x2
⇒ x2 = 400 − 256 = 144 = 122
⇒ x = 12 feet
Therefore, the base (foot) of the ladder is 12 feet away from the wall.
4.
Take a = 5, b = 12 and c = 13
Now, a2 + b2 = 52 +122 = 25 +144 = 169 = 132 = c2
By the converse of Pythagoras theorem, the triangle with given measures is a right angled triangle.
5.
a) Δ ABC is right angled as AB ⊥ AC at A.
b) AB and AC are legs of Δ ABC.
c) CB is called as the hypotenuse.
d) ㄥB + ㄥC = 900 and equal angles are opposite to equal sides. Hence, ㄥB = ㄥC = \(\frac { { 90 }^{ 0 } }{ 2 } \) = 450
8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - பாடறிந்து ஒழுகுதல் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 3-கல்வி கரையில - பல்துறைக் கல்வி Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 3-கல்வி கரையில - புத்தியைத் தீட்டு Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - தமிழர் மருத்துவம் ( நேர்காணல்) Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
