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Class 10 Math Projection of a Side of a Triangle


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9. Whether the triangle with sides 5 \mathrm{~cm} 7 \mathrm{~cm} 8 \mathrm{~cm} is acute obtuce or right angled.
9. Whether the triangle with sides  5 \mathrm{~cm} 7 \mathrm{~cm} 8 \mathrm{~cm}  is acute obtuce or right angled.

9.Whetherthetrianglewithsides5 cm7 cm8 cmisacuteobtuceorrightangled.9. Whether the triangle with sides 5 \mathrm{~cm} 7 \mathrm{~cm} 8 \mathrm{~cm} is acute obtuce or right angled.

6. In a triangle A B C m \overline{B C}=21 \mathrm{~cm} . m \overline{A C}=17 \mathrm{~cm} m \overline{A B}=10 \mathrm{~cm} . Calculate the projection of \overline{A B} upon \overline{B C} .
6. In a triangle  A B C m \overline{B C}=21 \mathrm{~cm} . m \overline{A C}=17 \mathrm{~cm} m \overline{A B}=10 \mathrm{~cm} . Calculate the projection of  \overline{A B}  upon  \overline{B C} .

6.InatriangleABCmBC=21 cm.mAC=17 cmmAB=10 cm.CalculatetheprojectionofABuponBC.6. In a triangle A B C m \overline{B C}=21 \mathrm{~cm} . m \overline{A C}=17 \mathrm{~cm} m \overline{A B}=10 \mathrm{~cm} . Calculate the projection of \overline{A B} upon \overline{B C} .

8. In a \triangle A B C a=17 \mathrm{~cm} b=15 \mathrm{~cm} and c=8 \mathrm{~cm} find m \angle B .
8. In a  \triangle A B C a=17 \mathrm{~cm} b=15 \mathrm{~cm}  and  c=8 \mathrm{~cm}  find  m \angle B .

8.InaABCa=17 cmb=15 cmandc=8 cmfindmB.8. In a \triangle A B C a=17 \mathrm{~cm} b=15 \mathrm{~cm} and c=8 \mathrm{~cm} find m \angle B .

3. In a \triangle A B C calculate m \overline{B C} when m \overline{A B}=5 \mathrm{~cm} m \overline{A C}=4 \mathrm{~cm} m \angle A=60^{\circ} .
3. In a  \triangle A B C  calculate  m \overline{B C}  when  m \overline{A B}=5 \mathrm{~cm} m \overline{A C}=4 \mathrm{~cm} m \angle A=60^{\circ} .

3.InaABCcalculatemBCwhenmAB=5 cmmAC=4 cmmA=60.3. In a \triangle A B C calculate m \overline{B C} when m \overline{A B}=5 \mathrm{~cm} m \overline{A C}=4 \mathrm{~cm} m \angle A=60^{\circ} .

4. In a \triangle A B C calculate m \overline{A C} when m \overline{A B}=5 \mathrm{~cm} m \overline{B C}=4 \sqrt{2} \mathrm{~cm} m \angle B=45^{\circ} .
4. In a  \triangle A B C  calculate  m \overline{A C}  when  m \overline{A B}=5 \mathrm{~cm} m \overline{B C}=4 \sqrt{2} \mathrm{~cm} m \angle B=45^{\circ} .

4.InaABCcalculatemACwhenmAB=5 cmmBC=42 cmmB=45.4. In a \triangle A B C calculate m \overline{A C} when m \overline{A B}=5 \mathrm{~cm} m \overline{B C}=4 \sqrt{2} \mathrm{~cm} m \angle B=45^{\circ} .

1. In a \triangle A B C m \angle A=60^{\circ} prove that (B C)^{2}=(A B)^{2}+(A C)^{2}-m \overline{A B} \cdot m \overline{A C} .
1. In a  \triangle A B C m \angle A=60^{\circ}  prove that  (B C)^{2}=(A B)^{2}+(A C)^{2}-m \overline{A B} \cdot m \overline{A C} .

1.InaABCmA=60provethat(BC)2=(AB)2+(AC)2mABmAC.1. In a \triangle A B C m \angle A=60^{\circ} prove that (B C)^{2}=(A B)^{2}+(A C)^{2}-m \overline{A B} \cdot m \overline{A C} .

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