Question

∠ A and ∠C are the pairs of interior angles formed by two parallel lines and its transversal. If m∠ A = 1100 then m∠ C = ? a) 600 b) 700 c) 800 d) 1100​

Answer 1

answer :

Step-by-step explanation:

Given:l∥m

sum of the interior angles on the same side of transversal is 180

∘

b+52

∘

=180

∘

⇒b=180

∘

−52

∘

=128

∘

And a=52

∘

∴a=52

∘

,b=128

∘

Answer 2

Answer:

The standard atomic weight (Ar, standard(E)) of a chemical element is the weighted arithmetic mean of the relative isotopic masses of all isotopes of that element weighted by each isotope's abundance on Earth.