Index: node_modules/d3-shape/src/math.js
===================================================================
--- node_modules/d3-shape/src/math.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-shape/src/math.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,20 @@
+export const abs = Math.abs;
+export const atan2 = Math.atan2;
+export const cos = Math.cos;
+export const max = Math.max;
+export const min = Math.min;
+export const sin = Math.sin;
+export const sqrt = Math.sqrt;
+
+export const epsilon = 1e-12;
+export const pi = Math.PI;
+export const halfPi = pi / 2;
+export const tau = 2 * pi;
+
+export function acos(x) {
+  return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
+}
+
+export function asin(x) {
+  return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
+}