Which best explains why constantinople did not fall until 1453

In △abc the angle bisectors drawn from vertices a and b intersect at point d. find ∠adb if: ∠c= γ

Which of the following was not an effect of westward expansion? a. native american tribes suffered confinement on reservations. b. native americans learned new techniques of irrigation. c. many native americans died from the spread of disease. d. natural resources were depleted from misuse by white settlers.

Today england’s government is encouraging tertiary economic activities ,including_to make up for the loss of industry