Question
A modern periodic table consists of ________groups and
_________periods, respectively.Solution
In the long form of the periodic table there are 7 horizontal rows called periods and 18 vertical columns called groups .
The altitude of an equilateral triangle is 6√3 cm. Find the area of the equilateral triangle.
The area of a triangle is 480 cm² and the ratio of its sides is 10: 24: 26. What is the perimeter of the triangle?
In a ∆ABC, angle BAC = 90°. If BC = 25 cm, then what is the length of the median AD?
The parallel sides of a trapezium and its height are in an arithmetic progression with a common difference of 4. If the height is the highest term and t...
A right-angled triangle has one leg of 12 cm and the hypotenuse of 13 cm. Find the length of the other leg.
- What is the average of the first eight triangular numbers?
The perimeter of an equilateral triangle is 48√3 cm. Find its height.
Given a right-angled triangle with the perpendicular measuring 36 cm and the base measuring 48 cm, determine the length of the shortest median of the tr...
In a ΔDEF, ∠D = 45°, ∠E = 2∠F. What is the value of ∠F?
- Find the distance between the parallel sides of a trapezium whose area is 315 cm² and the lengths of the parallel sides are 15 cm and 21 cm respectively.
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