In isosceles triangle the length of a base is 10 cm and the length of a leg is 13 cm. What is the radius of a circle inscribed in this triangle? Will GIVE BRAINLIEST ANSWER! Worth 100 POINTS!

Over time, historians have changed the ways they study the past because they have: o a. emphasized the study of oral history passed down in communities for generations. o b. started to explore history through the perspectives of many different groups. c. focused on uncovering archaeological evidence rather than analyzing documents. d. largely abandoned studying comparative and cultural history in favor of microhistory.