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Lesson 1 What0:42:08

Lesson 1 What is History ? | EVS 2 | Chapter 1 What is History ? | EVS part 2

In fig the0:11:51

In fig the vertices of square DEFG are on the sides of triangle ABC. angle A = 90°. Then prove that

In fig XY0:03:17

In fig XY || seg AC. If 2AX = 3BX and XY = 9. Complete the activity to find the value of AC

bisectors of angle0:08:37

bisectors of angle B and angle C of triangle ABC intersect each other inpoint X. Line AX intersects

In triangle PQR0:02:53

In triangle PQR seg PM is a median. Angle bisectors of angle PMQ and angle PMR intersect side PQ

In the figure0:10:44

In the figure seg PA, seg QB, seg RC and seg SD are perpendicular to line AD. AB = 60, BC = 70,

In figure 1.75,0:04:44

In figure 1.75, A – D – C and B – E – C seg DE || side AB If AD = 5,DC = 3, BC = 6.4 then find BE.

triangle MNT ~0:03:42

triangle MNT ~ triangle QRS. Length of altitude drawn from point T is 5 and length of altitude drawn

In figure PM0:03:47

In figure PM = 10 cm area of triangle PQS = 100 sq.cm area of triangle QRS = 110 sq.cm then find NR.

In figure angle0:02:33

In figure angle ABC = angle DCB = 90° AB = 6, DC = 8 then area of triangle ABC upon area of triangle

Ratio of areas0:03:08

Ratio of areas of two triangles with equal heights is 2 : 3. If base of the smaller triangle is 6 cm

In D ABC,0:05:27

In D ABC, B - D – C and BD = 7, BC = 20 then find following ratios.

A A test0:06:35

A A test for similarity of triangles | SAS test of similarity of triangles | SSS test for similarity

Proof of AAA0:15:10

Proof of AAA test | AAA test for similarity of triangles | Theorem AAA test

In figure seg0:04:27

In figure seg PQ || seg DE, area of triangle PQF = 20 units, PF = 2 DP, then find area of DPQE

triangle LMN ~0:02:56

triangle LMN ~ triangle PQR, 9 x area of triangle PQR = 16 area of LMN. If QR = 20 then find MN.

If triangle ABC0:02:24

If triangle ABC ~ triangle PQR, area of triangle ABC = 80, A (D PQR) = 125, then fill in the blanks.

The ratio of0:01:54

The ratio of corresponding sides of similar triangles is 3 : 5, then find the ratio of their areas .

Theorem of areas0:11:50

Theorem of areas of similar triangles Theorem

In the figure,0:06:12

In the figure, in triangle ABC, point D on side BC is such that, angle BAC = angle ADC. Prove that

In the figure,0:02:39

In the figure, seg AC and seg BD intersect each other in point P and AP/CP = BP/DP. Prove that

ABCD is a0:05:30

ABCD is a parallelogram point E is on side BC. Line DE intersects ray AB in point T. Prove that

In trapezium ABCD,0:04:27

In trapezium ABCD, side AB || side DC, diagonals AC and BD intersect in point O. If AB = 20, DC = 6