Which type of statement must be proven in geometry? a. axiom
b. definition
c. postulate.
d. theorem

Theorem are the type of  statement must be proven in geometry.

Step-by-step explanation:

1)  Axiom  are the statements or prepositions that are accepted and do not need any proof. Example : if a and b are real numbers then then their sum is also a real number.

2) Definition is a statement given to define something.

3) Postulates is a proposition that requires no proof and is for a specific purpose assumed true, and that is used in the proof of other propositions; axiom.

4) theorem are the statements that can be proved using axioms , definition etc.

Thus, from above all theorem are the type of statement must be proven in geometry.

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.