Area of a triangle from its three sides by Heron's formula

1. A.
   30 cm$^2$
2. B.
   35 cm$^2$
3. C.
   40 cm$^2$
4. D.
   42 cm$^2$

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1. A.
   300 square cm
2. B.
   305 square cm
3. C.
   306 square cm
4. D.
   307 square cm

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1. A.
   $14.9$ cm$^2$
2. B.
   $14.7$ cm$^2$
3. C.
   $14.5$ cm$^2$
4. D.
   $14.3$ cm$^2$

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1. A.
   37, 11, 28, 16
2. B.
   21, 30, 28, 7
3. C.
   37, 21, 11, 9
4. D.
   37, 21, 9, 7

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1. A.
   $90$ cm$^2$
2. B.
   $135$ cm$^2$
3. C.
   $150$ cm$^2$
4. D.
   $180$ cm$^2$

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1. A.
   18
2. B.
   17
3. C.
   16
4. D.
   15

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1. A.
   $3\sqrt{7}$ square unit
2. B.
   8 square unit
3. C.
   7 square unit
4. D.
   $7\sqrt{3}$ square unit

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1. A.
   $165\ \text{cm}^2$
2. B.
   $110\ \text{cm}^2$
3. C.
   $82.5\ \text{cm}^2$
4. D.
   $72.5\ \text{cm}^2$

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