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Sunday, 16 August 2026
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Mathematics Past Questions and Answers

Topic: lengths and areas of plane geometrical figures

Jamb Mathematics Questions - lengths and areas of plane geometrical figures

Question 11:
The vectors a and b are given in terms of two perpendicular units vectors i and j on a plane by a = 2i - 3j, b = -i + 2j. Find the magnitude of the vector a + 3b
  • A 2
  • B 4
  • C \(\sqrt{10}\)
  • D 35
  • E 2.2
View Answer & Explanation
Question 12:
In the figure, DE//BC: DB//FE: DE = 2cm, FC = 3cm, AE = 4cm. Determine the length of EC.
  • A 4cm
  • B 6cm
  • C 3cm
  • D 2cm
  • E 1cm
View Answer & Explanation
Question 13:
In the figure, AB is parallel to CD then x + y + z is
  • A 185<sup style='font-size: smaller;'>o</sup>
  • B 200<sup style='font-size: smaller;'>o</sup>
  • C 270<sup style='font-size: smaller;'>o</sup>
  • D 360<sup style='font-size: smaller;'>o</sup>
  • E 195<sup style='font-size: smaller;'>o</sup>
View Answer & Explanation
Question 14:
In the Figure FD\\AC, the area of AEF = 6sq.cm. AE = 3cm, BC = 3cm, CD = 5cm, < BCD is an obtuse angle. Find the length of BD.
  • A \(\sqrt{33}\)
  • B 6
  • C 4
  • D 2\(\sqrt{13}\)
  • E 4\(\sqrt{5}\)
View Answer & Explanation
Question 15:
In \(\bigtriangleup\)PQR, PQ = 10cm, QR = 8cm and RP = 6cm, the perpendicular RS is drawn from R to PQ. Find the length of RS
  • A 4cm
  • B 32cm
  • C \(\frac{30}{7}\)
  • D \(\frac{40}{7}\)
  • E 4.8cm
View Answer & Explanation