Question

7. Add the decimals: 23.85 , 8.94 0.087 and 314.6 8. Find the complement of right angle 9. Name the following: (1) An angle whose measure is more than 180° but less than 360°. (ii) A line intrsecting two or more given lines in a plane at distinct points 10. Simplify (-45) + (-12-31 11. What will be the sum of an integer and its additive inverse 12. Convert into fraction and in simplest form0.124 13. One -fourth of a number plus 3 gives 4. Find the number 14. Find the value of n if [225] = 2n +7 15. Find the perimeter of a regular octagon whose side is "a" units​

Answer 1

To add the given decimals, align the decimal points and add the digits. The complement of a right angle is 90 degrees. An angle between 180° and 360° is a reflex angle, and a line intersecting multiple lines is a transversal.

Step-by-step explanation:

To add decimals, align the decimal points of the numbers and then add the digits. Start from the rightmost digit and proceed to the left, carrying over any extra digits to the left. For example, to add 23.85, 8.94, 0.087, and 314.68:

1. Add the numbers after aligning the decimal points: 23.85 + 8.94 + 0.087 + 314.68 = 347.557.

The complement of a right angle is the angle that, when added to the right angle, equals 90 degrees. Therefore, the complement of a right angle is 90 degrees.

(1) An angle whose measure is more than 180° but less than 360° is called a reflex angle.

(ii) A line intersecting two or more given lines in a plane at distinct points is called a transversal.