Question

prove that equal chords of a circle subtend equal angle at centre​

Answer 1

In ΔAOB and ΔCOD,

AB=CD (Given)

AO=CO (radius)

OB=OD (radius)

By S.S.S congruency,

ΔAOB≅ΔCOD

⇒∠AOB=∠COD.

PLZ MARK AS BRAINLIEST !!

Answer 2

Answer:

why the plasma membrane is also called selectively semi permeable membrane

Step-by-step explanation:

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. ... It allows hydrophobic molecules and small polar molecules diffuse through the lipid layer, but does not allow ions and large polar molecules cannot diffuse through the membrane.